For developing a "not fast" RDM proxy hardware, use ACK_timer or other method?

[yxj-ae86]

HI, RPMer, I am a RDM rookie.
Right now we are developing a RDM proxy, a power line communication hardware which convert RDM/DMX512 to PLC two-way.
There is one PLC proxy connects to the RDM master and a PLC-RDM/DMX node connects to RDM/DMX light.

We have finished DMX512 part, but when face RDM, its timing is critical that our PLC module can not meet the requirements. And we have two choice:

1. One is using ACK-timer or Queued message, but RDM OG in this forum have said that this maybe not a good choice for not all RDM master support this.
2. Use asynchronous communication or "cheated communication" : when RDM master send some control/set message, PLC proxy replied it instantly, and then transmit the messages to the remote PLC-RDM/DMX node; when RDM master wanna read some info from RDM/DMX light, and PLC proxy also reply it instantly from its "on-chip RAM's data" which is collected periodically.

Which one is a better choice, or, other suggestions is also thankful.

Thanks in advance.